<script type="text/javascript" src="<?php echo 'http://' . $_SERVER['HTTP_HOST']  ?>/admin/layout/ckeditor/ckeditor.js"></script>
<script type="text/javascript" src="<?php echo 'http://' . $_SERVER['HTTP_HOST']  ?>/admin/layout/ckeditor/config.js"></script>
<link href="<?php echo 'http://' . $_SERVER['HTTP_HOST'] ?>/admin/layout/ckeditor/contents.css" rel="stylesheet">